I've actually thought about doing one. but it would be like the blog logo or something, because there's not really a specific song or lyric that.... I just thought of some I could have.
"Singin along with F. Mercury wishing he was still performing"
"Mirai wa zutto saki da yo"

My brothers' girlfriend was about to tattoo "my heart's a battleground" over the heart, but then she met my brother and she didn't since it settled down.. :p